The practise and study of encryption and decryption - encoding data so that it can only be decoded by specific individuals.
A system for encrypting and decrypting
data is a cryptosystem.
These usually involve an algorithm
for combining the original data ("plaintext") with one or
more "keys" - numbers or strings of characters known only to
the sender and/or recipient.
The resulting output iz known as "ciphertext".
21 114-71 222 3211 441 411 341 433 195 111 124 225 245 181 213 173 351 335 353 48 115, 215 172 244 332 182 173 371 329 3210 202 192 292 513 497 354 216 244 378 538 416 301 396 213 293 357 3211 396 244 111 161 357 222 144 63 12 13, 293 378 229 31 142 63 246 344 163 361 72 216 371 46 264 47 441 612 631 453 394 582 442 552 516 544 447 512 613 572 632 421 522 586 562 493 423 572 495 5310 614 493 474 418 573 2211 211 441 171 253 2210 191 334 194 72 211 324 231 161 48. 21 114-71 222 3211 103 194 228 173 64 142 344 356 261 273 412 282 162 3212 282 421 152 402 271 244 441 196 441 245 253 357 181 213 376 262 2610 211 214 253 228 331 151 352 442 652 612 584, 231 211 327 194 246 182 132 396 213 441 151 152 142 271 246 351 263 253 252 241 214 171 212 357 334 443 343 421 221 111 131 193 264 261 231 152 228 284 213 211 152 332 271 293 132 441 271 253 246 122 362 223 393 341 346 293 301 324 355 105 301 262 162 191 322 326 324 326 381 441 231 293 282 383.
